碱土金属氟卤化物二组分体系

高等学校化学学报 ›› 1985, Vol. 6 ›› Issue (11): 957.

碱土金属氟卤化物二组分体系

林建华, 苏勉曾

北京大学化学系

收稿日期:1984-07-30 出版日期:1985-11-24 发布日期:1985-11-24
基金资助:
中国科学院科学基金

On Some Binary Systems of Alkali Earth Metal Fluoride Halides

Lin Jianhua, Su Mianzeng

Department of Chemistry, Peking University, Beijing

Received:1984-07-30 Online:1985-11-24 Published:1985-11-24

摘要/Abstract

摘要： 用高温固相反应法和NH₄X卤化法合成了BaFCl、BaFBr,BaFI,SrFCl和SrFBr等单一氟卤化物,并合成了BaFCl_1-xBr_x(Ⅰ),BaFCl_1-xl_x(Ⅱ),BaFBr_1-xI_x(Ⅲ),SrFcl_1-xBr_x(Ⅳ)和Sr_1-xBa_xFBr等二元体系的各试样,用热分析和固相晶格参数法确定了上述各体系的相图,其中I、Ⅲ和Ⅳ体系都是具有最低熔点的连续固溶体系,Ⅱ和Ⅴ是共晶体系。

Abstract: The fluoride halides of barium and strontium BaFCl, BaFBr, BaFI, SrFCl and SrFBr, as well as some binary systems of them BaFCl_1-xBr_x (Ⅰ), BaFCl_1-xI_x (Ⅱ), BaFBr_1-xI_x(Ⅲ), SrFCl_1-xBr_x (Ⅳ), and Sr_1-xBa_xFBr(Ⅴ) were synthesized by the method of solid state reaction at high temperatures. Among them BaFIwas prepared by the reaction of NH₄Iwith BaF₂ at 400℃ for the first time.Phase diagrames and the subsolidus phase relationships of these binary systems have been studied by thermal analysis and by the method of lattice parameter determinations respectively. Ⅰ, Ⅲ and Ⅳ are systems of completely miscible solid solutions with a minimum melting point. Ⅱ and Ⅴ are systems of binary eutectic. There exists a correlation between the type of phase diagrames of these binary systems and the relative difference of c/a of the constituents, of which the system consists.

TrendMD:

林建华, 苏勉曾. 碱土金属氟卤化物二组分体系. 高等学校化学学报, 1985, 6(11): 957.

Lin Jianhua, Su Mianzeng . On Some Binary Systems of Alkali Earth Metal Fluoride Halides. Chem. J. Chinese Universities, 1985, 6(11): 957.